CN102730582A - Hydraulic rotary system start-stop buffering device, and crane - Google Patents
Hydraulic rotary system start-stop buffering device, and crane Download PDFInfo
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- CN102730582A CN102730582A CN2012102045084A CN201210204508A CN102730582A CN 102730582 A CN102730582 A CN 102730582A CN 2012102045084 A CN2012102045084 A CN 2012102045084A CN 201210204508 A CN201210204508 A CN 201210204508A CN 102730582 A CN102730582 A CN 102730582A
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Abstract
The invention discloses a hydraulic rotary system start-stop buffering device, and a crane. The invention belongs to the technical field of a hydraulic system. The system comprises a closed type hydraulic pump and a rotary motor. An oil outlet of the closed type hydraulic pump is connected to an oil inlet of the rotary motor. An oil outlet of the rotary motor is connected to an oil inlet of the closed type hydraulic pump. The rotary motor is connected to a brake. A buffering device is connected in parallel with the rotary motor on a hydraulic oil path. The buffering device comprises an oil conduction part, an overflow part, and a damping conduction part. An oil outlet of the buffering device communicates with an oil tank. According to the invention, a bypass oil path with restricted flow rate is adopted, heavy load is increased or started or stopped damping is rapidly rotated, pressure gaining is retarded, the controllability is good, and the service life of a brake pad is prolonged.
Description
Technical field
The present invention relates to the hydraulic efficiency pressure system technology, relate in particular to a kind of hydraulic gyration system's start and stop shock absorber and hoisting crane.
Background technology
At present, hoisting crane hydraulic gyration system exists open type and two kinds of forms of enclosed, wherein; Open-circuit system adopts change-over valve, rotary buffering valve to realize the direction control of revolution action, the control of start and stop buffering; Can obtain excellent control performances, but pipeline is complicated, cost is higher; Closed system is then relatively more succinct, and enclosed pump self can be realized direction control, and the volumetric speed control mode also is easy to realize, but the stationarity of start and stop has much room for improvement.Fig. 1 a, Fig. 1 b and Fig. 1 c show three kinds of typical Closed Hydraulic rotary systems that exist in the prior art respectively; Be respectively system 1, system 2, system 3; The key distinction between three kinds of hydraulic gyration systems is the difference of drg mode, and wherein, system 1 adopts the keying of switch valve 1 control static brake 0; System 2 adopts the keying of switch valve 1, apportioning valve 2 control static brakes 0, and system 3 adopts the keying of switch valve 1, apportioning valve 2 control wet type dynamic brakes 0 '.
Also has a kind of hoisting crane enclosed Hydraulic slewing system in the prior art; The keying of passing ratio valve control brake device; And the increase damping hole is ganged up between the motor oil inlet and outlet, thereby the acquisition revolution starts, stops and the steady control of process, and its system is shown in system 2 among Fig. 1 b.
At least there is following problem in the prior art:
1) keying of drg is provided with by program opportunity in advance, is difficult to coupling with the condition of loading that exists at random, and drg is closed the fatigue damage that can cause the reductor inner gear too early, causes evening excessively stopping to lag behind, and increases the weight of rotating drift sense, and controllability is bad;
2) for the way that between the motor oil inlet and outlet, increases the buffering damping, conducting motor oil inlet and outlet can cause when vehicle is in rugged road surface, taking place the revolution startup and reverse phenomenon;
3) the wet type dynamic brake need increase the flushing cooling oilway, and adopts proportional control, and the brake plate easy abrasion, needs periodic replacement, and maintenance cost is higher.
Summary of the invention
A kind of hydraulic gyration system's start and stop shock absorber and hoisting crane are provided at present, can set for the enclosed rotary system increases response pressure, through the bleed off circuit of flow restricted; Strengthen the damping that heavy duty or fast rotation start, stop; Slow down pressure gain, controllability is good, prolongs brake plate service life; Maintenance cost is low, specifically realizes through following technical proposals:
A kind of hydraulic gyration system start and stop shock absorber; Said hydraulic gyration system comprises closed type hydraulic pump and rotary motor; The oil outlet of said closed type hydraulic pump is connected with the oil inlet of said rotary motor, and the oil outlet of said rotary motor is connected with the oil inlet of said closed type hydraulic pump, and said rotary motor connects a drg; Wherein, Said shock absorber and said rotary motor are parallel with one another on hydraulic circuit, and said shock absorber comprises fluid conducting parts, overflow means and damping conducting parts, and two oil inlets of said fluid conducting parts are connected with oil inlet, the oil outlet of said rotary motor respectively; The oil outlet of said fluid conducting parts, said overflow means and said damping conducting parts are connected in series, and the oil outlet of said shock absorber is communicated with fuel tank.
Preferably, said fluid conducting parts, said overflow means, said damping conducting parts and said fuel tank are linked in sequence.
Preferably, said fluid conducting parts, said damping conducting parts, said overflow means and said fuel tank are linked in sequence.
Preferably, said fluid conducting parts are shuttle valve or change-over valve.
Preferably, said overflow means is a by pass valve.
Preferably, said by pass valve is straight moving by pass valve or precursor overflow valve.
Preferably, said by pass valve is a constant difference overflow valve, and said by pass valve has A pilot port, B pilot port, P oil inlet and T return opening, and said damping conducting parts are between said A pilot port and said B pilot port, and said T return opening connects said fuel tank.
Preferably, said damping conducting parts are cutoff port or adjustable throttling.
A kind of hoisting crane comprises crane main body, and swing type mechanism and hydraulic gyration system is characterized in that, said hydraulic gyration system has above-mentioned any described hydraulic gyration system start and stop shock absorber.
Technique scheme has following advantage or beneficial effect:
1, realizes the conducting of high pressure side fluid through shuttle valve or reducing valve,, realize the effect of buffering damping through cutoff port restriction buffer traffic size;
2, can realize different buffering dampings through the latus rectum of adjustment cutoff port;
3, when playing buffer action, replace part deep fat in the closed system, be beneficial to system radiating.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 a, Fig. 1 b and Fig. 1 c show the structural representation of three kinds of Closed Hydraulic rotary systems of the prior art respectively;
Fig. 2 a shows the structural representation according to the hydraulic gyration system start and stop shock absorber of the embodiment of the invention one;
Fig. 2 b shows the structural representation according to the hydraulic gyration system start and stop shock absorber of the embodiment of the invention two;
Fig. 2 c shows the structural representation when hydraulic gyration system start and stop shock absorber by pass valve is constant difference overflow valve in the embodiment of the invention.
The specific embodiment
Below in conjunction with schematic diagram and concrete operations embodiment the present invention is described further.
In the present embodiment; A kind of hydraulic gyration system start and stop shock absorber is provided, and the hydraulic gyration system comprises closed type hydraulic pump 3 and rotary motor 4, and the oil outlet of closed type hydraulic pump 3 is connected with the oil inlet of rotary motor 4; The oil outlet of rotary motor 4 is connected with the oil inlet of closed type hydraulic pump 3; Rotary motor 4 connects a drg 0, and the brake cylinder of drg 0 is a normally closed, relies on effect restriction rotary motor 4 operations of spring force when promptly being failure to actuate; Have only pressure oil to get into brake cylinder, the effect that oppositely overcomes spring force could brake off.
Shock absorber 5 is parallel with one another on hydraulic circuit with rotary motor 4; Shock absorber 5 comprises fluid conducting parts 51, overflow means 52 and damping conducting parts 53; Two oil inlets of fluid conducting parts 51 are connected with oil inlet, the oil outlet of rotary motor 4 respectively; The oil outlet of fluid conducting parts 51, overflow means 52 and damping conducting parts 53 are linked in sequence successively, and the oil outlet of this shock absorber is communicated with fuel tank 54.
In a specific embodiment, shown in Fig. 2 a, fluid conducting parts 51, overflow means 52, damping conducting parts 53 and fuel tank 54 are linked in sequence.
Preferably, closed type hydraulic pump 3 is an enclosed electricity proportioning pump, its flow can be in the 0-100% scope step-less adjustment; Need not change-over valve, the variable through pump changes the flow and the direction of hydraulic oil in the working connection, realize rotary motor 4 speed change and switching-over; Its fine motion property is good, and stable working.
Preferably, fluid conducting parts 51 are shuttle valve or change-over valve, realize the oil circuit trend with the size through the both sides oil pressure, promptly realize the conducting of high pressure side fluid.
Preferably, overflow means 52 is a by pass valve.Play the effect that reduces force value through the by pass valve overflow, in addition, can also consume car body inertia kinetic energy through by pass valve overflow heating.
Further preferably, by pass valve is straight moving by pass valve or precursor overflow valve.
Preferably, damping conducting parts 53 are cutoff port or adjustable throttling, and also available other have the conducting structure of shock damping action.Through cutoff port or adjustable throttling restriction buffer traffic size, realize the effect of buffering damping.
The control oil channel of the drg 0 of rotary motor 4 is provided with two-position four way change valve 1, and the P hydraulic fluid port of change-over valve is the oily oil inlet of control, and the A hydraulic fluid port connects the oil-feed oil circuit of static brake 0, and the T hydraulic fluid port connects the oil return fuel tank.
In another specific embodiment; Please referring to shown in Fig. 2 b; Fluid conducting parts 51, damping conducting parts 53, overflow means 52 and fuel tank 54 are linked in sequence; Compare with previous embodiment, present embodiment be with the place-exchange of damping conducting parts 53 and overflow means 52 once, the single-piece technique effect is not had materially affect.
In above-mentioned two embodiment, preferably, by pass valve is a constant difference overflow valve; Shown in Fig. 2 c, by pass valve, promptly overflow means 52 has A pilot port, B pilot port, P oil inlet and T return opening; Damping conducting parts are between A pilot port and B pilot port, and the T return opening connects fuel tank 54.
During concrete work; Can choose heavy duty, the high-speed working condition that needs buffering through the setting of by pass valve pressure; Promptly starting initially and can set an initial pressure value through by pass valve; Such as this initial pressure value is 10Mpa～15Mpa, has only in force value arrives the scope of this initial pressure value, and hydraulic gyration of the present invention system start and stop shock absorber just can be started working.
When the construction machinery and equipment underloading was turned round, operation pressure did not produce the bypass shock damping action less than the setting response pressure of by pass valve.Because of load is light, operation pressure is little, and realize on the startup of revolution action, the variable slope that stops to cushion by pump, only can produce less impact, within hydraulic efficiency pressure system and reductor ability to bear, can not produce harm.
When construction machinery and equipment heavy duty or fast rotation, operation pressure is greater than the setting response pressure of by pass valve, high pressure side hydraulic oil through behind the shuttle valve in the overflow of by pass valve place, and through flowing into fuel tank 54 behind the cutoff port.Along with the fluctuation of operation pressure, the flow through cutoff port changes, and produces corresponding shock damping action.Apparatus of the present invention were slowed down the pressure ascendant trend when revolution started, and apparatus of the present invention reduced the inertia angular transposition and consume kinetic energy, the effect that play startup, stops to cushion when revolution stopped.
Except above-mentioned hydraulic gyration system start and stop shock absorber; The embodiment of the invention also provides a kind of hoisting crane; Comprise crane main body, swing type mechanism and hydraulic gyration system, wherein the hydraulic gyration system comprises the above hydraulic gyration system start and stop shock absorber of introducing; All the other structures please refer to prior art, do not repeat them here.
More than specific embodiment of the present invention is described in detail, but the present invention is not restricted to the specific embodiment of above description, it is just as example.For example adopt the change-over valve replacement two-position four way change valve of other types to carry out commutation function, as long as can move by the control brake device of setting that flows to.To those skilled in the art, any equivalent modifications and alternative also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (9)
1. hydraulic gyration system start and stop shock absorber; Said hydraulic gyration system comprises closed type hydraulic pump (3) and rotary motor (4); The oil outlet of said closed type hydraulic pump (3) is connected with the oil inlet of said rotary motor (4); The oil outlet of said rotary motor (4) is connected with the oil inlet of said closed type hydraulic pump (3); Said rotary motor (4) connects a drg (0), it is characterized in that, said shock absorber (5) is parallel with one another on hydraulic circuit with said rotary motor (4); Said shock absorber (5) comprises fluid conducting parts (51), overflow means (52) and damping conducting parts (53); Two oil inlets of said fluid conducting parts (51) are connected with oil inlet, the oil outlet of said rotary motor (4) respectively, and the oil outlet of said fluid conducting parts (51), said overflow means (52) and said damping conducting parts (53) are connected in series, and the oil outlet of said shock absorber is communicated with fuel tank (54).
2. hydraulic gyration system start and stop shock absorber according to claim 1 is characterized in that said fluid conducting parts (51), said overflow means (52), said damping conducting parts (53) and said fuel tank (54) are linked in sequence.
3. hydraulic gyration system start and stop shock absorber according to claim 1 is characterized in that said fluid conducting parts (51), said damping conducting parts (53), said overflow means (52) and said fuel tank (54) are linked in sequence.
4. like claim 2 or 3 said hydraulic gyration system start and stop shock absorbers, it is characterized in that said fluid conducting parts (51) are shuttle valve or change-over valve.
5. like claim 2 or 3 said hydraulic gyration system start and stop shock absorbers, it is characterized in that said overflow means (52) is a by pass valve.
6. like the said hydraulic gyration of claim 5 system start and stop shock absorber, it is characterized in that said by pass valve is straight moving by pass valve or precursor overflow valve.
7. like the said hydraulic gyration of claim 5 system start and stop shock absorber; It is characterized in that; Said by pass valve is a constant difference overflow valve; Said by pass valve has A pilot port, B pilot port, P oil inlet and T return opening, and said damping conducting parts (53) are between said A pilot port and said B pilot port, and said T return opening connects said fuel tank (54).
8. like claim 2 or 3 said hydraulic gyration system start and stop shock absorbers, it is characterized in that said damping conducting parts (53) are cutoff port or adjustable throttling.
9. a hoisting crane comprises crane main body, and swing type mechanism and hydraulic gyration system is characterized in that, said hydraulic gyration system has any described hydraulic gyration system start and stop shock absorber in the aforesaid right requirement 1 to 8.
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| CN201210204508.4A CN102730582B (en) | 2012-06-20 | 2012-06-20 | Hydraulic rotary system start-stop buffering device, and crane |
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| CN201210204508.4A CN102730582B (en) | 2012-06-20 | 2012-06-20 | Hydraulic rotary system start-stop buffering device, and crane |
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| CN102730582A true CN102730582A (en) | 2012-10-17 |
| CN102730582B CN102730582B (en) | 2014-12-17 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996559A (en) * | 2012-12-28 | 2013-03-27 | 徐州重型机械有限公司 | Rotation control valve, rotation control system and crane |
| CN103032402A (en) * | 2013-01-04 | 2013-04-10 | 中联重科股份有限公司 | Automatic positioning valve of hydraulic rotary device, rotary hydraulic system and engineering machinery |
| CN103754781A (en) * | 2013-12-31 | 2014-04-30 | 浙江三一装备有限公司 | Hydraulic system and crane |
| CN103807245A (en) * | 2014-01-21 | 2014-05-21 | 广西柳工机械股份有限公司 | Electric proportional overflow cushion valve for engineering machines |
| CN104747535A (en) * | 2015-02-02 | 2015-07-01 | 三一重机有限公司 | Hydraulic buffering system and engineering machine |
| CN106395660A (en) * | 2016-10-19 | 2017-02-15 | 中联重科股份有限公司 | Hydraulic control system of hoisting mechanism and crane |
| CN106542448A (en) * | 2016-12-28 | 2017-03-29 | 潍柴动力股份有限公司 | A kind of hydraulic closed system, hydraulic closed walking and hoisting system |
| CN106629431A (en) * | 2016-12-30 | 2017-05-10 | 徐州重型机械有限公司 | Hoist |
| CN110065901A (en) * | 2019-04-19 | 2019-07-30 | 南京比例液压技术有限公司 | The hydraulic device of brake for elevator |
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| CN102249154A (en) * | 2010-05-21 | 2011-11-23 | 上海三一科技有限公司 | Free-slewing cushion and brake hydraulic system and method used in crawler crane |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102996559A (en) * | 2012-12-28 | 2013-03-27 | 徐州重型机械有限公司 | Rotation control valve, rotation control system and crane |
| CN103032402A (en) * | 2013-01-04 | 2013-04-10 | 中联重科股份有限公司 | Automatic positioning valve of hydraulic rotary device, rotary hydraulic system and engineering machinery |
| CN103032402B (en) * | 2013-01-04 | 2015-04-15 | 中联重科股份有限公司 | Automatic positioning valve of hydraulic rotary device, rotary hydraulic system and engineering machinery |
| CN103754781B (en) * | 2013-12-31 | 2016-05-11 | 浙江三一装备有限公司 | A kind of hydraulic system and crane |
| CN103754781A (en) * | 2013-12-31 | 2014-04-30 | 浙江三一装备有限公司 | Hydraulic system and crane |
| CN103807245A (en) * | 2014-01-21 | 2014-05-21 | 广西柳工机械股份有限公司 | Electric proportional overflow cushion valve for engineering machines |
| CN104747535A (en) * | 2015-02-02 | 2015-07-01 | 三一重机有限公司 | Hydraulic buffering system and engineering machine |
| CN104747535B (en) * | 2015-02-02 | 2017-02-22 | 三一重机有限公司 | Hydraulic buffering system and engineering machine |
| CN106395660A (en) * | 2016-10-19 | 2017-02-15 | 中联重科股份有限公司 | Hydraulic control system of hoisting mechanism and crane |
| CN106542448A (en) * | 2016-12-28 | 2017-03-29 | 潍柴动力股份有限公司 | A kind of hydraulic closed system, hydraulic closed walking and hoisting system |
| CN106629431A (en) * | 2016-12-30 | 2017-05-10 | 徐州重型机械有限公司 | Hoist |
| CN106629431B (en) * | 2016-12-30 | 2018-06-26 | 徐州重型机械有限公司 | Crane |
| CN110065901A (en) * | 2019-04-19 | 2019-07-30 | 南京比例液压技术有限公司 | The hydraulic device of brake for elevator |
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| CN102730582B (en) | 2014-12-17 |
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Effective date of registration: 20160111 Address after: Eight in the 313028 Zhejiang city of Huzhou province Cao Zhen Village daily standard factory Auxiliary Building No. 2 Patentee after: Zhejiang Sany Equipment Co., Ltd. Address before: 201202, room 6999, 205 Chuansha Road, Shanghai, Pudong New Area Patentee before: Shanghai Sany Technology Co., Ltd. |